toolkit/xre/nsSigHandlers.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is Mozilla Communicator client code.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Netscape Communications Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 1998
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *   Jerry.Kirk@Nexwarecorp.com
  24  *   Chris Seawood <cls@seawood.org>
  25  *
  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either of the GNU General Public License Version 2 or later (the "GPL"),
  28  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  29  * in which case the provisions of the GPL or the LGPL are applicable instead
  30  * of those above. If you wish to allow use of your version of this file only
  31  * under the terms of either the GPL or the LGPL, and not to allow others to
  32  * use your version of this file under the terms of the MPL, indicate your
  33  * decision by deleting the provisions above and replace them with the notice
  34  * and other provisions required by the GPL or the LGPL. If you do not delete
  35  * the provisions above, a recipient may use your version of this file under
  36  * the terms of any one of the MPL, the GPL or the LGPL.
  37  *
  38  * ***** END LICENSE BLOCK ***** */
  39
  40 /*
  41  * This module is supposed to abstract signal handling away from the other
  42  * platforms that do not support it.
  43  */
  44
  45 #include <signal.h>
  46 #include <stdio.h>
  47 #include <string.h>
  48 #include "prthread.h"
  49 #include "plstr.h"
  50 #include "prenv.h"
  51 #include "nsDebug.h"
  52
  53 #if defined(LINUX)
  54 #include <sys/time.h>
  55 #include <sys/resource.h>
  56 #include <unistd.h>
  57 #include <stdlib.h> // atoi
  58 #endif
  59
  60 #if defined(SOLARIS)
  61 #include <sys/resource.h>
  62 #endif
  63
  64 #ifdef XP_BEOS
  65 #include <be/app/Application.h>
  66 #include <string.h>
  67 #include "nsCOMPtr.h"
  68 #include "nsIServiceManager.h"
  69 #include "nsIAppStartup.h"
  70 #include "nsXPFEComponentsCID.h"
  71 #endif
  72
  73 #ifdef MOZ_WIDGET_PHOTON
  74 #include <photon/PhProto.h>
  75 #endif
  76
  77 static char _progname[1024] = "huh?";
  78 static unsigned int _gdb_sleep_duration = 300;
  79
  80 #if defined(LINUX) && defined(DEBUG) && \
  81       (defined(__i386) || defined(__x86_64) || defined(PPC))
  82 #define CRAWL_STACK_ON_SIGSEGV
  83 #endif
  84
  85 #ifdef MOZ_WIDGET_PHOTON
  86 void abnormal_exit_handler(int signum)
  87 {
  88   /* Free any shared memory that has been allocated */
  89   PgShmemCleanup();
  90
  91 #if defined(DEBUG)
  92   if (    (signum == SIGSEGV)
  93        || (signum == SIGILL)
  94        || (signum == SIGABRT)
  95        || (signum == SIGFPE)
  96      )
  97   {
  98     printf("prog = %s\npid = %d\nsignal = %s\n",
  99            _progname, getpid(), strsignal(signum));
 100
 101     printf("Sleeping for %d seconds.\n",_gdb_sleep_duration);
 102     printf("Type 'gdb %s %d' to attach your debugger to this thread.\n",
 103            _progname, getpid());
 104
 105     sleep(_gdb_sleep_duration);
 106
 107     printf("Done sleeping...\n");
 108   }
 109 #endif
 110
 111   _exit(1);
 112 }
 113 #elif defined(CRAWL_STACK_ON_SIGSEGV)
 114
 115 #include <unistd.h>
 116 #include "nsISupportsUtils.h"
 117 #include "nsStackWalk.h"
 118
 119 extern "C" {
 120
 121 PR_STATIC_CALLBACK(void) PrintStackFrame(void *aPC, void *aClosure)
 122 {
 123   char buf[1024];
 124   nsCodeAddressDetails details;
 125
 126   NS_DescribeCodeAddress(aPC, &details);
 127   NS_FormatCodeAddressDetails(aPC, &details, buf, sizeof(buf));
 128   fprintf(stdout, buf);
 129 }
 130
 131 }
 132
 133 void
 134 ah_crap_handler(int signum)
 135 {
 136   printf("\nProgram %s (pid = %d) received signal %d.\n",
 137          _progname,
 138          getpid(),
 139          signum);
 140
 141   printf("Stack:\n");
 142   NS_StackWalk(PrintStackFrame, 2, nsnull);
 143
 144   printf("Sleeping for %d seconds.\n",_gdb_sleep_duration);
 145   printf("Type 'gdb %s %d' to attach your debugger to this thread.\n",
 146          _progname,
 147          getpid());
 148
 149   sleep(_gdb_sleep_duration);
 150
 151   printf("Done sleeping...\n");
 152 }
 153 #endif // CRAWL_STACK_ON_SIGSEGV
 154
 155 #ifdef XP_BEOS
 156 void beos_signal_handler(int signum) {
 157 #ifdef DEBUG
 158         fprintf(stderr, "beos_signal_handler: %d\n", signum);
 159 #endif
 160         nsresult rv;
 161         nsCOMPtr<nsIAppStartup> appStartup(do_GetService(NS_APPSTARTUP_CONTRACTID, &rv));
 162         if (NS_FAILED(rv)) {
 163                 // Failed to get the appstartup service so shutdown the hard way
 164 #ifdef DEBUG
 165                 fprintf(stderr, "beos_signal_handler: appShell->do_GetService() failed\n");
 166 #endif
 167                 exit(13);
 168         }
 169
 170         // Exit the appshell so that the app can shutdown normally
 171         appStartup->Quit(nsIAppStartup::eAttemptQuit);
 172 }
 173 #endif
 174
 175 #ifdef MOZ_WIDGET_GTK2
 176 // Need this include for version test below.
 177 #include <glib.h>
 178 #endif
 179
 180 #if defined(MOZ_WIDGET_GTK2) && (GLIB_MAJOR_VERSION > 2 || (GLIB_MAJOR_VERSION == 2 && GLIB_MINOR_VERSION >= 6))
 181
 182 static GLogFunc orig_log_func = NULL;
 183
 184 extern "C" {
 185 static void
 186 my_glib_log_func(const gchar *log_domain, GLogLevelFlags log_level,
 187                  const gchar *message, gpointer user_data);
 188 }
 189
 190 /* static */ void
 191 my_glib_log_func(const gchar *log_domain, GLogLevelFlags log_level,
 192                  const gchar *message, gpointer user_data)
 193 {
 194   if (log_level & (G_LOG_LEVEL_ERROR | G_LOG_FLAG_FATAL | G_LOG_FLAG_RECURSION)) {
 195     NS_DebugBreak(NS_DEBUG_ASSERTION, message, "glib assertion", __FILE__, __LINE__);
 196   } else if (log_level & (G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING)) {
 197     NS_DebugBreak(NS_DEBUG_WARNING, message, "glib warning", __FILE__, __LINE__);
 198   }
 199
 200   orig_log_func(log_domain, log_level, message, NULL);
 201 }
 202
 203 #endif
 204
 205 void InstallUnixSignalHandlers(const char *ProgramName)
 206 {
 207   PL_strncpy(_progname,ProgramName, (sizeof(_progname)-1) );
 208
 209   const char *gdbSleep = PR_GetEnv("MOZ_GDB_SLEEP");
 210   if (gdbSleep && *gdbSleep)
 211   {
 212     unsigned int s;
 213     if (1 == sscanf(gdbSleep, "%u", &s)) {
 214       _gdb_sleep_duration = s;
 215     }
 216   }
 217
 218 #if defined(MOZ_WIDGET_PHOTON)
 219  /* Neutrino need this to free shared memory in case of a crash */
 220   signal(SIGTERM, abnormal_exit_handler);
 221   signal(SIGQUIT, abnormal_exit_handler);
 222   signal(SIGINT,  abnormal_exit_handler);
 223   signal(SIGHUP,  abnormal_exit_handler);
 224   signal(SIGSEGV, abnormal_exit_handler);
 225   signal(SIGILL,  abnormal_exit_handler);
 226   signal(SIGABRT, abnormal_exit_handler);
 227   signal(SIGFPE,  abnormal_exit_handler);
 228
 229 #elif defined(CRAWL_STACK_ON_SIGSEGV)
 230   signal(SIGSEGV, ah_crap_handler);
 231   signal(SIGILL, ah_crap_handler);
 232   signal(SIGABRT, ah_crap_handler);
 233   signal(SIGFPE, ah_crap_handler);
 234 #endif // CRAWL_STACK_ON_SIGSEGV
 235
 236 #if defined(DEBUG) && defined(LINUX)
 237   const char *memLimit = PR_GetEnv("MOZ_MEM_LIMIT");
 238   if (memLimit && *memLimit)
 239   {
 240     long m = atoi(memLimit);
 241     m *= (1024*1024);
 242     struct rlimit r;
 243     r.rlim_cur = m;
 244     r.rlim_max = m;
 245     setrlimit(RLIMIT_AS, &r);
 246   }
 247 #endif
 248
 249 #if defined(SOLARIS)
 250 #define NOFILES 512
 251
 252     // Boost Solaris file descriptors
 253     {
 254         struct rlimit rl;
 255
 256         if (getrlimit(RLIMIT_NOFILE, &rl) == 0)
 257
 258             if (rl.rlim_cur < NOFILES) {
 259                 rl.rlim_cur = NOFILES;
 260
 261                 if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
 262                     perror("setrlimit(RLIMIT_NOFILE)");
 263                     fprintf(stderr, "Cannot exceed hard limit for open files");
 264                 }
 265 #if defined(DEBUG)
 266                 if (getrlimit(RLIMIT_NOFILE, &rl) == 0)
 267                     printf("File descriptors set to %d\n", rl.rlim_cur);
 268 #endif //DEBUG
 269             }
 270     }
 271 #endif //SOLARIS
 272
 273 #ifdef XP_BEOS
 274         signal(SIGTERM, beos_signal_handler);
 275 #endif
 276
 277 #if defined(MOZ_WIDGET_GTK2) && (GLIB_MAJOR_VERSION > 2 || (GLIB_MAJOR_VERSION == 2 && GLIB_MINOR_VERSION >= 6))
 278   const char *assertString = PR_GetEnv("XPCOM_DEBUG_BREAK");
 279   if (assertString &&
 280       (!strcmp(assertString, "suspend") ||
 281        !strcmp(assertString, "stack") ||
 282        !strcmp(assertString, "abort") ||
 283        !strcmp(assertString, "trap") ||
 284        !strcmp(assertString, "break"))) {
 285     // Override the default glib logging function so we get stacks for it too.
 286     orig_log_func = g_log_set_default_handler(my_glib_log_func, NULL);
 287   }
 288 #endif
 289 }